JPH0812093A - Bulk object sticking preventive device for continuous type unloader - Google Patents

Abstract

PURPOSE:To provide a bulk object attaching preventive device for continuous type unloader, with which it is possible to certainly exfoliate the bulk objects eventually attached to and stacked on a supporting frame of a scratching part. CONSTITUTION:At a certain spacing horizontally, two sprockets 4, 5 are installed so that the lower part of a bucket elevator 2 serves as a scratching part 1 in a shoe form, and a supporting frame 7 to support the sprockets 4, 5 is provided between the sprocket 4, 5. Thus a continuous type unloader is formed, wherein the supporting frame 7 is covered with an angle-shaped rubber cover 23 to prevent the falling bulk objects from stacking on the frame 7. Inside the cover 22, an air nozzle 29 is furnished which expands and shrinks the cover 22 with a high pressure air force and exfoliates the bulk objects B attached to and stacked on the surface of the cover.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous unloader for continuously unloading bulk materials such as coal and powdered ore, and more particularly to peeling bulk materials that are adhered to and stacked on a support frame of a scraping unit. The present invention relates to a device for preventing adherence of loose particles in a continuous unloader.

[0002]

2. Description of the Related Art A continuous unloader is for continuously unloading bulk materials such as coal and powdered ore loaded on a ship using a bucket elevator. The scraping part is shown in FIG. As shown in the drawing, the scraping unit 1 winds the bucket-equipped chain 3 at the lower part of the bucket elevator 2 around two sprockets 4 and 5 arranged at intervals in the horizontal direction to form a shoe-shaped overall shape. It is configured.

The shoe-shaped scraping section 1 is inserted into the hold through a hatch of a ship or the like, and a drive sprocket (not shown) provided above the sprocket 5 is rotated to orbit the chain 3 with a bucket. Then, the bulk materials such as coal and ore loaded in the warehouse are scraped off by the respective buckets 6 and continuously loaded (Japanese Patent Publication No. 3-33614, Japanese Patent Publication No.
3-78339, etc.).

A support frame 7 for supporting the sprockets 4 and 5 is provided between the sprockets 4 and 5. The support frame 7 has an expandable structure including an inner cylinder 8 and an outer cylinder 9, and sprockets 4 and 5 provided on the cylinders 8 and 9 are urged by an extension cylinder 10 so as to be always separated from each other. . On the other hand, the distance between the sprocket 5 and the drive sprocket above it is freely changed by the telescopic cylinder 11.

According to this structure, when the support frame 9 is pushed down by the telescopic cylinder 11 from the state shown in FIG. 1 to widen the space between the sprocket 5 and the drive sprocket above it, the length of the chain 3 becomes constant. To narrow the distance between the sprockets 4 and 5 (see the alternate long and short dash line in the figure). On the contrary, if the support frame 9 is pulled upward by the telescopic cylinder 11 and the distance between the sprocket 5 and the drive sprocket is narrowed, the distance between the sprocket 4 and 5 is widened by that amount and the original state is restored.

[0006]

By the way, since the bulk material such as coal or powdered ore loaded onto the continuous unloader has some adhesiveness, it adheres to the support frame 9 during the loading. May be stacked. In particular, depending on the water content of the bulk material, it becomes extremely easy to adhere. This causes the following problems.

(1) Bulk materials such as coal deposited and laminated on the support frame 9 exert a load on the telescopic cylinder 11 that holds the support frame 9 by pulling it up by its own weight, which causes performance deterioration. That is, the lifting capacity of the cylinder 11 is reduced by the weight of the loose material attached to the support frame 9,
The expansion / contraction function of the scraping unit 1 is reduced.

(2) In addition, the weight of the deposited and stacked loose matter causes a loss of balance with a balance weight (not shown) provided on the opposite side of the bucket elevator 2 shown in FIG. 1, making normal operation difficult. . This imbalance may lead to the fall of the entire device.

As a measure against these problems, a cover made of a smooth material (such as high molecular weight polyethylene) on the upper portion of the support frame 7 which is hard to adhere to loose particles such as coal is formed at a steeper angle than the attachment angle of the loose particles. It may be arranged. However, even with this measure, the adhesion and deposition could not be avoided depending on the water content of the bulk material.

The object of the present invention, which was devised in consideration of the above circumstances, is a device for preventing adherence of loose particles in a continuous unloader capable of reliably peeling loose particles that are adhered and laminated on the support frame of the scraping section. To provide.

[0011]

SUMMARY OF THE INVENTION To achieve the above object, the present invention arranges two sprockets horizontally at intervals so that the lower part of a bucket elevator serves as a shoe-shaped scraping portion. In a continuous unloader provided with a support frame that supports each sprocket in between, the support frame is covered with a mountain-shaped rubber cover that prevents stacked loose objects from stacking on the support frame, Inside the rubber cover, an air nozzle is provided which expands and contracts the rubber cover by high-pressure air force to peel off the loose material attached and laminated on the surface.

[0012]

According to the above construction, the loose material dropped during unloading is attached and laminated to the mountain-shaped rubber cover provided to cover the support frame, but is provided inside the rubber cover. The rubber cover is expanded and contracted by the high pressure air force of the air nozzle, so it is peeled off and dropped.

[0013]

An embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows an outline of the scraping unit 1 of the continuous unloader. As shown in the figure, the scraping unit 1 includes a chain 3 with a bucket below a bucket elevator 2, two sprockets 4 and 5 arranged at a horizontal interval, and one sprocket arranged above the sprockets 4 and 5. It is wound around 12 and is shaped like a shoe. That is, the chain with bucket 3 is wound around a drive sprocket (not shown) and sprockets 4, 5 and 12 located above the sprocket 5, and is adapted to receive a driving force from the drive sprocket and revolve.

A support frame 7 for supporting the sprockets 4 and 5 is provided between the sprockets 4 and 5. The support frame 7 has an expandable structure including an inner cylinder 8 and an outer cylinder 9. That is, the guide rail 13 is provided on the side surface of the inner cylinder 8, and the guide roller 14 rolling on the guide rail 13 is provided on the inner surface of the outer cylinder 9. The inner cylinder 8 and the outer cylinder 9 are connected to each other by an extension cylinder 10 which is always given a biasing force in the extension direction. That is, the extension cylinder 10 has one end 10a connected to the inner cylinder 8 and the other end 10b connected to the outer cylinder 9, and urges the sprockets 4 and 5 in the separating direction.

The outer cylinder 9 of the support frame 7 is connected to a holding frame 16 provided on the casing 15 of the bucket elevator 2 via a telescopic cylinder 11 via a connecting stay 17 and a tilting cylinder 18. That is, the casing 15 of the bucket elevator 2 is provided with the holding frame 16 via the telescopic cylinder 11, and the holding frame 16 is provided with the connecting stay 17 and the tilting cylinder 18 on the outer cylinder portion 9 of the support frame 7. Is hung. In the figure, 19 is a guide roller provided on the elevator casing 15, and 20 is a guide rail provided on the holding frame 16. According to this configuration, the support frame 9 includes the connection stay 17, the tilting cylinder 18, the holding frame 16, and the telescopic cylinder 11.
Will be suspended and held in the elevator casing 15 via the.

Therefore, when the telescopic cylinder 11 is contracted from the state shown in FIG. 1, the support frame 7 descends with respect to the elevator casing 15 via the holding frame 16, the connecting stay 17 and the tilting cylinder 18. Then, the distance between the sprocket 5 and the drive sprocket above it increases. Then, since the length of the chain with bucket 3 is constant, the length in the vertical direction is inevitably shortened in the horizontal direction, and the distance between the sprockets 4 and 5 is narrowed as indicated by the one-dot chain line. As a result, the length of the scraping unit 1 is shortened. It goes without saying that if the telescopic cylinder 11 is extended from this state, it returns to the original state. Further, when the tilting cylinder 18 is expanded and contracted, the outer cylinder 9 of the support frame 7 tilts around the connecting portion 21 of the connecting stay 17.

On the upper portion of the outer cylinder 9 of the support frame 7,
As shown in FIGS. 2 to 6, a mountain-shaped rubber cover 22 (a flexible cover having some elasticity) that prevents loose material dropped from the bucket 6 from being stacked on the support frame 7. It is set up. The rubber cover 22 is formed by cutting a rubber plate (chloroprene rubber) having a thickness of about 10 mm in accordance with the shape of the outer cylinder 9 as shown in FIG. 3, and both sides thereof are shown in FIG. The outer cylinder 9 by the bolt 23
Is to be fixed. That is, a plurality of cut grooves 24 for bolts are provided on both sides of the rubber cover 22 at predetermined intervals in the longitudinal direction.

On the surface of the rubber cover 22, a polymer liner 25 with high lubricity (fluorine-based, silicon-based, etc.) is integrally bonded to the surface of the rubber cover 22 as shown in FIG. There is. As the polymer liner 25, one having elasticity equivalent to that of the rubber cover 22 is used. Because the rubber cover 22 is expanded and contracted by the high pressure air force of the air nozzle, which will be described later, at this time, the polymer liner 25
This is because if the elastic properties of the rubber cover 22 and the rubber cover 22 are extremely different, they may peel off.

As shown in FIGS. 4 and 5, the rubber cover 22 has a bolt 23 on the outer cylinder 9 of the support frame 7.
The rod body 2 is provided in the shape of a mountain and is arranged in the longitudinal direction between the outer cylinder 9 and the rubber cover 22.
A predetermined space 27 is provided by 6. A wire with tension may be used instead of the rod body 26, and this wire may also be used as a power supply wire. In the space 27, the rubber cover 22 and the outer cylinder 9 are provided.
An air pipe 28 is housed so as to be in contact with and.

As shown in FIG. 2, the air pipe 28 extends from the side of the connecting stay 17 along the outer cylinder 9 of the support frame 7 to approximately the center thereof, and an air nozzle 29 is opened at the tip thereof. The air nozzle 29 is opened so as to be in close contact with the inner surface of the rubber cover 22, as shown in FIG. A root portion of the air pipe 28 is connected to a pressure accumulating tank 30 provided inside the outer cylinder 9. High pressure air is supplied to the pressure accumulating tank 30 from above through an air supply pipe 31. The air supply pipe 31 is provided with a check valve 32 for preventing backflow.

According to this structure, high pressure air is accumulated in the pressure accumulating tank 30, and the accumulated high pressure air is opened at an interval of 30 seconds by the controller (not shown) of the opening / closing valve 33 provided on the air pipe 28. By being valved, it is relieved from the air nozzle 29 opened at the tip of the air pipe 28. The high pressure air relieved from the air nozzle 29 exerts a function of expanding and contracting the rubber cover 22 and the polymer liner 25 as shown in FIG.

The operation of this embodiment will be described.

The bulk material dropped from the bucket 6 during unloading is adhered and laminated on the mountain-shaped rubber cover 22 provided to cover the outer cylinder 9 of the support frame 7 as shown in FIG. This is because although the polymer liner 25 having high lubricity is adhered to the surface of the rubber cover 22 and the angle thereof is made into a mountain shape to form a steep angle to some extent, this alone does not completely prevent the adhesion.

The adhered and laminated bulk material B is removed as follows.

The on-off valve 33 shown in FIG. 2 is opened by the controller at intervals of 30 seconds. Then, high-pressure air in the pressure accumulating tank 30 is ejected from the air nozzle 29, and the rubber cover 22 is corrugated and expands and contracts as shown in FIG. More specifically, when high-pressure air is jetted from the air nozzle 29, the substantially central portion of the rubber cover 22 is deformed into a convex shape, and the deformation propagates to the left and right, causing the entire cover 22 to be wavy.
Due to this deformation, the polymer liner 25 adhered to the surface of the rubber cover 22 is also integrally wave-like deformed and expanded and contracted, and the loose material B attached thereon is peeled off. That is, the substantial adhered portion of the loose material B is cut off in a Casabata shape by the expansion and contraction of the polymer liner 25.

Here, since the polymer liner 25 has a rate substantially equal to the expansion / contraction rate of the rubber cover 22,
The liner 25 and the cover 22 do not separate, and they expand and contract integrally, and the loose material B on the surface of the polymer liner 25.
Only the liner 25 is separated from the liner 25 and peeled off. Further, due to the undulating deformation of the polymer liner 25, the stacked loose material B itself is deformed, and the deformed force also causes the stacked loose material B to collapse. That is, the bulk B that has been adhered and laminated falls from the liner 25 due to the synergistic effect of collapse due to its own deformation force and peeling due to expansion and contraction of the polymer liner 25.

The air nozzle 29 has a rubber cover 2
Since one is arranged at a substantially central portion in the longitudinal direction of 2, the ejected air force is concentrated in one place, and the deformation amount of the rubber cover 22 increases, which also separates the loose material B. Have contributed. The diameter of the air pipe 28 in which the air nozzle 29 is opened is equal to the space 27 between the rubber cover 22 and the outer cylinder 9 as shown in FIGS. It also functions as a support. Further, since the air nozzle 29 is provided in close contact with the inner surface of the rubber cover 22 as shown in FIG. 6, it receives a reaction when high-pressure air is ejected, but the reaction force is received by the outer cylinder 9.

When the convex portion generated in the central portion by the air nozzle 29 propagates to the left and right, in this embodiment, the rubber cover 22 has a narrow width on the connecting stay 17 side and a wide width on the opposite side, as shown in FIG. Since the narrow portion is locally deformed, the wide portion is entirely deformed, so that the deformation amount of the convex portion propagating to the left and right is closer to the connecting stay 17 side. It will be bigger than the other side. Further, since the air nozzle 29 is located at the diagonal cut portion 30 shown in FIG. 3 where the rubber cover 22 changes from the wide width to the narrow width, the air cut 29 also propagates to the narrow connecting stay 17 side by the diagonal cut portion 30. The height of the convex portion is raised and becomes higher than the height of the convex portion propagating to the opposite side.

As a result, the loose material B laminated on the connecting stay 17 side is more likely to be peeled off than the loose material B laminated on the opposite side, which has the following advantages.
That is, most of the loose materials B stacked on the rubber cover 22 fall from an unloading portion (not shown) above the elevator casing 15 of the bucket elevator 2 and are stacked, so that the connecting stays are relatively viewed. It is easier to stack on the 17 side than on the opposite side. According to the present embodiment, the loose material B on the side of the connecting stay 17 which is easy to stack is efficiently peeled off.

Further, the rubber cover 22 is provided only on the outer cylinder 9 portion of the support frame 7 and not on the inner cylinder 8 portion, but the inner cylinder 8 is inserted into the outer cylinder 9 by the expansion and contraction operation. Therefore, in reality, no loose material is attached and laminated on the inner cylinder 8, which is not a problem.

[0032]

As described above, according to the loose substance adhesion preventing device for the continuous unloader according to the present invention, the loose substances to be adhered / laminated on the rubber-like cover provided on the support frame of the scraping portion are removed. By expanding and contracting the surface of the rubber cover with high pressure air force, it cuts off like a Casabata and surely peels off.
Can be removed.

[Brief description of drawings]

FIG. 1 is a side view of a scraping unit of a continuous unloader.

FIG. 2 is a side view of the loose substance adhesion preventing device according to the embodiment of the present invention.

FIG. 3 is a development view of a rubber cover.

4 is a sectional view taken along line IV-IV in FIG.

5 is a sectional view taken along line VV of FIG.

6 is a partially enlarged view of FIG.

[Explanation of symbols]

 1 Scraping Part 2 Bucket Elevator 4 Sprocket 5 Sprocket 7 Support Frame 22 Rubber Cover 29 Air Nozzle

Front Page Continuation (72) Inventor Shoji Hamaya 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. (72) Inventor Isao Miyazawa 1-1-19 Mori, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries Co., Ltd. Company Koto office (72) Inventor Shintaro Shimamura 1-19-10 Mori, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries Co., Ltd.Koto office (72) Inventor Hiroaki Tabata 1-19-10 Mori, Koto-ku, Tokyo Harima Ishikawajima Heavy industry Co., Ltd. Koto office

Claims (1)

[Claims] 1. A continuous type in which two sprockets are arranged horizontally at intervals so that the lower part of the bucket elevator serves as a shoe-shaped scraping part, and a support frame for supporting each of the sprockets is provided between the sprockets. In the unloader, the support frame is provided with a mountain-shaped rubber cover that prevents stacked loose pieces from being stacked on the support frame, and the inside of the rubber cover is covered with a rubber material by a high pressure air force. An apparatus for preventing adherence of loose particles of a continuous unloader, comprising an air nozzle for expanding and contracting a cover to separate loose particles attached and laminated on the surface thereof.